wiswell



(No Model.) 4 Sheets-Sheet 1.

J. O. WISWELL. ORE GRUSHER.

No. 337,726. Patented Mar. 9', 1886.

PETERS. Phclv-ulhagmphcr. wnnnmnn. 0.6.

(No Model.)

J. 0. WISWELL.

4 Sheets-Sheet 2.

ORE GRUSHER. No. 337,726.

Patented Mar. 9. 1886.

v a J W i 2 f & WiTNESSES'. I INIVENTDRI V r X wv PETERS. momma. wumwmc.

(No Model.) 4 Sheets-Sheet a.

J. G. WISWELL.

ORE CRUSHER.

No. 337,726. Patented Mar. 9, 1886.

N. PETERS PholuLilhngnphur, Washingmn. 0,0.

(Nd Model.) 4 Sheets-Sheet 4. J. C. WISWELL.

- ORE'ORUSHERi No. 337,726. Patented Mar. 9, 1886.

Jim IN 15/].

WiTNEEEESI 'NVENTUFU N. PETERS, VhollrLilhopzpMr, WalhingmmnC.

Erica.

JACOB C. \VISYVELL, OF MEDFORD, MASSACHUSETTS, ASSIGNOR TO THE VIS- WELL ELECTRIC MINING MACHINERY COMPANY, OF PORTLAND, ME.

ORE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 337,726, dated March 9, 1886.

Application filed October-12, 1885.

To all whom it may concern:

Be it known that I, JACOB C. XVIsWELL, of Medford, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Ore-Crushers, of which the following is a specification.

This invention relates to ore-crushing mills having circular beds or troughs and a series of crushing-rolls arranged to travel therein,

as shown in Letters Patent of the United States granted to me April 1, 1884, No. 296,096, and November 4, 1884, N0. 307,513.

The invention consists in the improvements hereinafter described, and subsequently point- 1 ed out in the claims.

In the accompanying drawings, forming a part of this specification, Figure 1 represents a vertical section of my improved ore-crusher. Fig. 2 represents a top view of the same.

Figs. 3 and 4 represent, respectively, top and bottom views of the bed. Fig. 5 representsa section on line x 41:, Fig. 3. Fig. 6 represents a section on line y 3 Fig. 4. Figs. 7, 8, and 9 represent detached views of the raking attachment. Figs. 10, 11, and 12 represent detached views of the scraping attachment.

The same letters of reference indicate the same parts in all the figures.

In the drawings, N represents the circular 0 supporting bed or trough, which has two inclined faces, 2 3.

a a represent the crushing-rolls, which may be of any desired number, four being shown in the present instance. Each of said rolls a 5 has two inclinedfaces, 2 3, the rolls being formed to fit the bed, as shown in Fig. 1.

To the rolls a are rigidly affixed arbors I), having the bearings in blocks 0, adapted to slide in vertical slots or guides 8, formed in a 0 frame, 0, hereinafter described, and in sockets in a sleeve, f, adapted to slide on the vertical driving-shaft g. Said shaft is journaled in a suitable supporting-frame, 9, its lower end bearing in a step, i. The frame 6 is composed 5 of a circular rim having vertical offsets or enlargements, in which are formed the guides or slots 8, a circular hub, 4, on the drivingshaft g, and radiating arms connecting said hub and rim. The hub 4 has vertical grooves receiving feathers 5 5 on the shaft 9, so that Serial No. 179,632. (No model.)

the frame rotates with the shaft,but is enabled to move vertically independently thereof. This freedom of vertical movement of the frame 6 and the collar f on the shaft enables the rolls a a to rise and fall freely, and thus pass over large fragments of ore which would otherwise impede their progress or be pushed along by them without being crushed. The arbors b b are prevented from moving lengthwise in the bearings c c by collars i i, affixed to them inside of the bearings. Said bearings have flanges which bear against the walls of the slots and prevent lateral displacement of the blocks. Springs j areinterposed between the boxes 0 and frame 6, as shown in my pat- 6 5 cut of April 1, 188i.

7t 7t represent chambers on the frame 6, said chambers having tubes Z, extending downwardly nearly to tubes in, extending upwardly from the boxes 0 0. Oil introduced into the chambers it passes through said tubes to the bearingsurfaces of the boxes 0 and arbors b b, which are thus lubricated.

I prefer to make the surfaces 2 3 of the bed or plates 19 in separate parts from the base or 7 5 supporting portion q of the bed, so that said surfaces 2' 3 when worn can be readily renewed without renewing the entire bed.

I prefer to make the supporting portion (1 in sections, as shown in Figs. 3 and 4, the wearing-plates breaking joints with the sections of the supporting portion, being in the present instance six in number, while the number of sections of the supporting portion is three. These numbers may be varied, however, as may be desired.

By securing the wearing plates to the supporting-sections in such manner as that the former break joints with the latter I secure two important results: first, a water-tight bed or trough, and, secondly, a strong, stiff, and firm bed for the rolls to operate upon to crush the ore.

The wearing-plates have bolts r projecting downwardly from their under sides through 5 orifices in the supporting portions and provided with nuts 1" at their lower ends, said bolts and nuts securing the wearing-plates to the supporting-sections. The bolts are preferably secured to the wearing-plates by being 10c cast into them, the bolts having heads or upsetends embedded in the cast metal of the wearing-plates.

The wearing-plates are provided with ears or projections at the points where the bolts are cast into them, which construct-ion permits me to secure said bolts at apoint outside of the line of the working-faces of the rolls, thus obtaining an entirely smooth and even surface over which the rolls travel. By ref-. erence to Fig. 5 it will also be seen that the bed is recessed to correspond withthe form of the wearing-plates and their ears, and the latter are set into the former so that the up per faces of the two parts are flush with each other, and a bed'or trough is formed free from all obstructions on its upper surface which would be calculated to impede the work of operating upon or manipulating the ore being crushed. The supporting sections are recessed in their lower sides at regular intervals, for the sake of lightness and economy of material.

v The sections of the supporting portion are connected by bolts u a, and the joints between the abutting ends of said sections are preferably calked with lead or other suitable material to make them tight. At the ends of the sections of the supporting portion, and between the recesses thereof, are bottom supports or chairs cast wit-h said sections.

It will be seen that the detachable wearingplates can be made of metal of any desired hardness and durability, since they do not require to be drilled; hence they can be made of much harder material than the supporting-sections, which require drilling for the various connecting bolts. The increased durability of the wearing-plates occasioned by moving the point at which the securingbolts are attached thereto beyond the line of the working-faces of the rolls, thus obtaining an uninterruptedly-smooth surface of the trough or bed; by setting the working-plates with their ears into the bed-sections, whereby all tendency of the rolls to crowd or carry said plates around with them in their movements is overcome; by arranging the working plates so as to break joints with the bed-sections, by which means solidity of the parts is secured as well as theinterchangeability of the wearing-plates,

, makes the bed more economical and effective in use than heretofore.

To the frame e between the rolls a a are affixed vertical standards A. To the lower end of each standard is pivoted an arm, B, which is provided with studs or bolts 0 0, whereby a rake-head, D, Figs. 7, S, and 9, or a scraping-blade, D, Figs. 10 and 11, may be attached to it. The arm B is arranged to allow the rake-teeth or the scraping-blade (as the case may be) to bear on theinner face, 2, of the bed N. The arm is arranged diagonally, one end being lower than the other, and the higher end being in advance of the lower end; The rakes or scrapers thus arranged, i11 111ov' ing over the inner face of the bed, force the material accumulating on said surface toward the center of the bed, and thus prevent it from accumulating or piling up on said inner. In some surface, as it has a tendency to do.

cases rakes are preferable, and in other cases e in one millin a different direction from that.

in which it is revolved in another mill, Ipivot the arm B to the standard A, so that it can project from either side of the standard, as shown in full and dotted lines in Fig. 7. I am thus enabled to make the lower end of the arm B its forward end in any case.

The head D (or the blade D) is removably attached to the arm B by the studs 0 O and nuts screwed thereon, said head (or blade) having orifices which receive said studs. The head (or blade) is thus capable of being inverted, so as to be in operative position when the arm B is changed from one position to the other.

The shaft M is provided with a bevel-pinion, Q, gearing with gear-wheel P on a shaft, M. Said shaft M has a friction-wheel, R, engaged with a similar wheel, S, on a shaft, T, which receives motion from a driving-shaft, to which a pulley, U, on the shaft T is belted. One end of the shaft T is mounted in a box, V, which is adapted to slide on a' fixed support, and is connected by a link, W, with a lever, W, said lever being connected to a Vertical lever, X, extending downwardly within reach of an attendant. These devices enable the shaft T to be moved so as th separate the frictionwheel S from or engage it with the wheel R, thus stopping or starting the machine, as the case may be.

I claim 1. The combination of the bed or trough, the driving-shaft, the rotary frame having slots or guides s and adapted to rotate with and move vertically on the shaft the collar f, also adapted to move vertically on said shaft, the rolls a, their arbors b, and the sliding boxes 0, as set forth.

2. The frame 0, adapted to move vertically on and rotate with the driving-shaft and provided with the slots or guides s, and the oilcups over said slots, combined with the boxes 0, adapted to slide in said guides and to receive oil from said cups, and the roll-arbors journaled in said boxes, as set forth.

3. The combination, with the rolls, of the wearing-plates provided with ears projecting outside of the line of the working-faces of the rolls, and having bolts in the under sides of said ears cast into theplate, and the supporting portion having holes to receive said bolts, as set forth.

4. The combination, with the rolls, of the wearing-plates provided with ears projecting outside of the line of the working-faces of the rolls, and having bolts in the under sides of saidframe, the reversible arms B, pivoted to said standards, and devices for moving over the inner face of the bed to force the material accumulating on said surface toward the center of the bed, detachably secured to said arms and bearing on the bed, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 8th day of October, 1885.

JACOB O. WISWELL.

\Vitnesses:

O. F. BROWN, H. BROWN. 

